8/14/2019 9700 s02 qp 5

1/8

This question paper consists of 5 printed pages, 2 blank pages and a Report Form.

SP (SLC/SLC) S23296/2 CIE 2002 [Turn over

CAMBRIDGE INTERNATIONAL EXAMINATIONS

General Certificate of Education Advanced Level

BIOLOGY 9700/5PAPER 5 Practical Test A2

MAY/JUNE SESSION 20021 hour 30 minutes

Candidates answer on the question paper.Additional materials:

As listed in Instructions to Supervisors

TIME 1 hour 30 minutes

INSTRUCTIONS TO CANDIDATES

Write your name, Centre number and candidate number in the spaces at the top of this page.

Answer both questions.

Write your answers in the spaces provided on the question paper.

INFORMATION FOR CANDIDATES

The intended number of marks is given in brackets [ ] at the end of each question or part question.You are advised to spend 50 minutes on Question 1 and 40 minutes on Question 2.

CandidateCentre Number Number

Candidate Name

FOR EXAMINERS USE

TOTAL

2

1

8/14/2019 9700 s02 qp 5

2/8

2

9700/5/M/J/02

Question 1 [50 minutes]

(a) K1 and K2 are stained, transverse sections of leaves from two different species ofplant.

(i) Make a large, labelled, plan drawing of K1 to show the distribution of tissues in the

leaf lamina (avoiding the midrib). Details of individual cells are not required.

[4]

(ii) Make a labelled, high-power drawing to show the detailed structure of threeadjacent cells from the palisade mesophyll layer.

[4]

For

Examiners

Use

8/14/2019 9700 s02 qp 5

3/8

3

9700/5/M/J/02 [Turn over

(b) The plant species from which K2 was taken grows in a dry habitat.

(i) Examine K2, using your microscope.

State four observable features that distinguish K2 from K1 and relate each featureto its function.

feature 1 ....................................................................................................................

function .....................................................................................................................

...................................................................................................................................

feature 2....................................................................................................................

function .....................................................................................................................

...................................................................................................................................

feature 3....................................................................................................................

function .....................................................................................................................

...................................................................................................................................

feature 4....................................................................................................................

function .....................................................................................................................

...............................................................................................................................[8]

(ii) With reference to photosynthesis, state one disadvantage to the plant of having aleaf form like the one in K2.

...................................................................................................................................

...............................................................................................................................[1]

[Total : 17]

For

Examiners

Use

8/14/2019 9700 s02 qp 5

4/8

4

9700/5/M/J/02

Question 2 [40 minutes]

You are required to design an experiment to test the effect of light intensity onphotosynthesis.

The apparatus that you may use in your design is shown in Fig. 2.1.

Fig. 2.1

The pondweed releases bubbles of gas from a freshly cut stem when illuminated.

When the light source is moved closer to the pondweed, the intensity of the lightincreases with the inverse square law. This means that if you half the distance betweenthe light source and the pondweed, the intensity of the light increases four-fold.

standard light source

syringe

screw clip

graduatedcapillary tube

gas collecting

pondweed

For

Examiners

Use

8/14/2019 9700 s02 qp 5

5/8

5

9700/5/M/J/02

(a) Describe how you would set up and use this apparatus, indicating the measurementsyou would take.

set up ...............................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

use ...................................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

measurements .................................................................................................................

..........................................................................................................................................

......................................................................................................................................[7]

(b) State which variables you would need to control, in order to ensure that the results youobtained were reliable.

..........................................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

......................................................................................................................................[2]

(c) A group of students carried out this experiment and obtained the following results.

Explain this relationship between the light intensity and gas production.

..........................................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

......................................................................................................................................[4]

[Total : 13]

For

Examiners

Use

lamp distance frompondweed / cm

80 60 40 20 10

bubbling rate/ arbitrary units

2 4 8 32 32

8/14/2019 9700 s02 qp 5

6/8

6

9700/5/M/J/02

BLANK PAGE

8/14/2019 9700 s02 qp 5

7/8

7

9700/5/M/J/02

BLANK PAGE

8/14/2019 9700 s02 qp 5

8/8

8

9700/5/M/J/02

REPORT FORM

The teacher responsible for this subject is asked to answer the following questions.

(a) Was the candidate physically handicapped in drawing or in using a microscope or is thecandidate colour-blind? If so, give brief details.

(b) Was the candidate handicapped by deficient material or apparatus? If so, give brief details.

(c) Was it necessary to make any substitutions for the materials sent from Cambridge? If so, givebrief details of the circumstances.

(d) Any comments.

Signed

N.B. Information that applies to all candidates need only be given on the first candidates answer book.